Milwaukee Twins Head Bolt Cover Set For Harley Milwaukee Twins Head Bolt Cover Set are a great way to dress up the stock head bolts on most Big Twin and Sportster models. The 1/2 12-point head bolts are constructed from steel and chrome-plated. They attach using a socket head set screw for easy installation. Features: Chrome plated These chrome caps dress up the stock 1/2 12-point head bolts Attach with stainless set screws and come complete with the necessary wrench